Make Keyframe use TimeTicks/TimeDelta to represent time instead of double.

ui/compositor/transform_animation_curve_adapter_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/compositor/transform_animation_curve_adapter.h"
 
 #include <sstream>
 
 #include "base/time/time.h"
+#include "cc/base/time_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/compositor/test/test_utils.h"
 
 namespace ui {
 
 namespace {
 
 // Check that the inverse transform curve gives the gives a transform that when
 // applied on top of the parent transform gives the original transform
 TEST(InverseTransformCurveAdapterTest, InversesTransform) {
@@ skipping 14 matching lines @@
                                               parent_start,
                                               parent_target,
                                               duration);
 
   InverseTransformCurveAdapter child_curve(parent_curve,
                                            child_transform,
                                            duration);
   static const int kSteps = 1000;
   double step = 1.0 / kSteps;
   for (int i = 0; i <= kSteps ; ++i) {
+    base::TimeDelta time_step = cc::TimeUtil::Scale(duration, i * step);
     std::ostringstream message;
     message << "Step " << i << " of " << kSteps;
     SCOPED_TRACE(message.str());
-    gfx::Transform progress_parent_transform =
-            parent_curve.GetValue(i*step);
-    gfx::Transform progress_child_transform =
-            child_curve.GetValue(i*step);
+    gfx::Transform progress_parent_transform = parent_curve.GetValue(time_step);
+    gfx::Transform progress_child_transform = child_curve.GetValue(time_step);
     CheckApproximatelyEqual(effective_child_transform,
                             progress_parent_transform *
                             progress_child_transform);
   }
 }
 
 } // namespace
 
 } // namespace ui